	(function($) {
		function filterPath(string) {
			return string
			.replace(/^\//,'')
			.replace(/(index|default).[a-zA-Z]{3,4}$/,'')
			.replace(/\/$/,'');
		}
		var locationPath = filterPath(location.pathname);
		var scrollElem = scrollableElement('html', 'body');

		$('a[href*=#]').each(function() {
			var thisPath = filterPath(this.pathname) || locationPath;
			if (  locationPath == thisPath
				&& (location.hostname == this.hostname || !this.hostname)
				&& this.hash.replace(/#/,'') ) {
				var $target = $(this.hash), target = this.hash;
			if (target) {
				var targetOffset = $target.offset().top;
				$(this).click(function(event) {
					event.preventDefault();
					$(scrollElem).animate({scrollTop: targetOffset}, 400, function() {
						location.hash = target;
					});
				});
			}
		}
	});

// use the first element that is "scrollable"
function scrollableElement(els) {
	for (var i = 0, argLength = arguments.length; i <argLength; i++) {
		var el = arguments[i],
		$scrollElement = $(el);
		if ($scrollElement.scrollTop()> 0) {
			return el;
		} else {
			$scrollElement.scrollTop(1);
			var isScrollable = $scrollElement.scrollTop()> 0;
			$scrollElement.scrollTop(0);
			if (isScrollable) {
				return el;
			}
		}
	}
	return [];
}

})(jQuery);
